package shili;

import java.util.concurrent.Callable;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.FutureTask;

public class callable {
    private static int result;
    public static void main1(String[] args) {
        Thread t = new Thread(()->{
           int sum = 0;
            for (int i = 0; i < 1000; i++) {
                sum+=i;
            }
            result = sum;
        });
        t.start();
        try {
            t.join();
        } catch (InterruptedException e) {
            throw new RuntimeException(e);
        }
        System.out.println();
    }

    public static void main(String[] args) throws ExecutionException, InterruptedException {
        Callable<Integer> callable = new Callable<Integer>() {
            @Override
            public Integer call() throws Exception {
                int sum = 0;
                for (int i = 0; i < 1000; i++) {
                    sum+=i;
                }
                return sum;
            }
        };
        FutureTask<Integer> futureTask = new FutureTask<>(callable);
        Thread t = new Thread(futureTask);
        t.start();
        //通过FutureTask拿到最终结果
        System.out.println(futureTask.get());
    }
}
